| Sigmaringen to Novi di Modena | 234.72 mi (377.75 km) |
| Sigmaringen to Novi Ligure | 230.82 mi (371.47 km) |
| Sigmaringen to Nuoro | 536.89 mi (864.03 km) |
| Sigmaringen to Occhiobello | 245.88 mi (395.71 km) |
| Sigmaringen to Oderzo | 221.95 mi (357.19 km) |
| Sigmaringen to Oggiono | 159.27 mi (256.33 km) |
| Sigmaringen to Olbia | 495.60 mi (797.58 km) |
| Sigmaringen to Oleggio | 174.01 mi (280.04 km) |
| Sigmaringen to Olgiate Comasco | 159.58 mi (256.83 km) |
| Sigmaringen to Olgiate Olona | 170.24 mi (273.98 km) |
| Sigmaringen to Omegna | 157.30 mi (253.14 km) |
| Sigmaringen to Opera | 186.79 mi (300.60 km) |
| Sigmaringen to Oppeano | 213.90 mi (344.24 km) |
| Sigmaringen to Orbassano | 227.23 mi (365.69 km) |
| Sigmaringen to Orbetello | 402.05 mi (647.03 km) |
